import { asyncRouterMap, constantRouterMap } from '@/router'

/**
 * 通过meta.role判断是否与当前用户权限匹配
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
    const checker = roles.filter(role => {
        if (route.name === role.name) {
            return true
        } else {
            if (role.children && role.children.length > 0) {
                return hasPermission(role.children, route)
            }
        }
    })
    return checker.length
}

/**
 * 递归过滤异步路由表，返回符合用户角色权限的路由表
 * @param asyncRouterMap
 * @param roles
 */
function filterAsyncRouter(asyncRouterMap, roles) {
    const accessedRouters = asyncRouterMap.filter(route => {
        if (hasPermission(roles, route)) {
            if (route.children && route.children.length) {
                route.children = filterAsyncRouter(route.children, roles)
            }
            return true
        }
        return false
    })
    return accessedRouters
}

const permission = {
    state: {
        asyncRouters: JSON.parse(JSON.stringify(asyncRouterMap)),
        routers: constantRouterMap,
        addRouters: [],
    },
    mutations: {
        SET_ROUTERS: (state, routers) => {
            state.addRouters = routers
            state.routers = constantRouterMap.concat(routers)
        }
    },
    actions: {
        GenerateRoutes({ commit }, data) {
            return new Promise(resolve => {
                const { isAdmin, roles } = data
                let accessedRouters
                if (isAdmin) {
                    accessedRouters = asyncRouterMap
                } else {
                    accessedRouters = filterAsyncRouter(asyncRouterMap, roles)
                        // accessedRouters.push(asyncRouterMap[asyncRouterMap.length - 1]);
                }
                console.dir(accessedRouters)
                commit('SET_ROUTERS', accessedRouters)
                resolve()
            })
        }
    }
}

export default permission